Early Finger Groove Stock 1903

[pcaru1]

I just picked up a 1.3 million SA 1903 with a 6-44 HS barrel. Bore is mirror brite and gauges a 1 at the muzzle. Serial number puts it around late 1928 for the receiver. It has what appears to be a faint cartouche of BA-W.L. on the stock. Benicia Arsenal rebuild I suppose. "P" in a circle struck twice at the wrist.
A couple of things strike me as odd.
1) The tip of the stock looks like it is stamped RI in seriff but has been overstruck twice with "S". Is that possible?
2) No parts other than the Remington R4 replacement bolt, lower band, and the trigger have mfg. marks. "U" on the band and what looks like a lot # on the trigger. Which is staked in place. I have looked through Poyer's and Brophy's books and can't seen to get any clear answers.
Any thoughts or comments welcomed. I have included some pics. Reply for more specific pics and I will accomodate. It even came with an original Boyt 42 sling mounted on it.

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